Hydrometallurgy : Metallurgical kinetics; Solution chemistry; Interfacial phenomena; Fine particle recovery; Electrometallurgy; Metals recycling

1961~1965 Research Assistant / Associate, SNU
1972~1980 Lecturer / Senior Lecturer. Chemical Eng., Monash Uni., Australia
1981~ Professor, Metallurgical Eng., South Dakota School of Mines & Tech
1986~1997 Editor-in-Chief, Mineral Processing and Extractive Metallurgy Review
1987~1994 Head, Metallurgical Eng., SDSM&T
1988~1992 Project Director, NSF/EPSCoR of South Dakota
1994~1999 Dean, College of Materials Science & Eng., SDSM&T
1994~ Regents Distinguished Professor
1998~ Douglas W. Fuerstenau Professor
1998~2001 Member, Engineering Education Advisory Committee. NAE/USA

1987 SDSM&T Presidential Outstanding Professor Award
1994 Ernest L. Buckley SD Governors Award
1995 Milton Wadsworth Award (SME Chemical Metallurgy Award)
1997 Millman of Distinction Award (SME/MPD Award)
1998 Distinguished Member (Fellow, SME/AIME)
1998 SD Board of Regents Award for Excellence in Research